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Previously, libbpf recorded CO-RE relocations with insns_idx resolved according to finalized subprog locations (which are appended at the end of entry BPF program) to simplify the job of light skeleton generator. This is necessary because once subprogs' instructions are appended to main entry BPF program all the subprog instruction indices are shifted and that shift is different for each entry (main) BPF program, so it's generally impossible to map final absolute insn_idx of the finalized BPF program to their original locations inside subprograms. This information is now going to be used not only during light skeleton generation, but also to map absolute instruction index to subprog's instruction and its corresponding CO-RE relocation. So start recording these relocations always, not just when obj->gen_loader is set. This information is going to be freed at the end of bpf_object__load() step, as before (but this can change in the future if there will be a need for this information post load step). Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20220426004511.2691730-7-andrii@kernel.org
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.