docs/bpf: Add description for CO-RE relocations

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Add a section on CO-RE relocations to llvm_relo.rst. Describe relevant .BTF.ext
structure, `enum bpf_core_relo_kind` and `struct bpf_core_relo` in some detail.

Description is based on doc-strings from:

  - include/uapi/linux/bpf.h:struct bpf_core_relo
  - tools/lib/bpf/relo_core.c:__bpf_core_types_match()

Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/bpf/20230826222912.2560865-2-eddyz87@gmail.com

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Eduard Zingerman 2023-08-27 01:29:12 +03:00 • committed by Daniel Borkmann

parent 2d71a90f7e

commit be4033d360

2 changed files with 329 additions and 6 deletions

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31

Documentation/bpf/btf.rst

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304

Documentation/bpf/llvm_reloc.rst

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