libbpf: Support flexible arrays in CO-RE

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Some data stuctures in kernel are defined with either zero-sized array or
flexible (dimensionless) array at the end of a struct. Actual data of such
array follows in memory immediately after the end of that struct, forming its
variable-sized "body" of elements. Support such access pattern in CO-RE
relocation handling.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191215070844.1014385-2-andriin@fb.com

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Andrii Nakryiko 2019-12-14 23:08:43 -08:00 • committed by Alexei Starovoitov

parent 01c6f7aaac

commit 1b484b301c

1 changed files with 29 additions and 5 deletions

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tools/lib/bpf/libbpf.c

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